Machine for spiral-cutting strips from circularly knitted stockinet fabrics



D 7, 1954 K. I. J. Ros'EN ,25

MACHINE FOR SPIRAL-CUTTING STRIPS FROM CIRCULARLY KNITTED STOCKINETTEmaxxcs Filed "Sept. 20, 1951 s Sheets-Sheet 2 2| FI.G.2. Q,

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United States Patent MACHINE FOR SPIRAL-CUTTING STRIPS FROM CIRCULARLYKNITTED ST OCKINET FABRICS Karl Isac Joel Rosn, Ulricehamn, SwedenApplication September 20, 1951, Serial No. 247,441

Claims. (Cl. 164-38) The present invention relates to a machine forcutting spiral strips from circularly knitted stockinet fabrics, themachine being so constructed as to cut up automatically a whole rollinto a continuous strip of desired uniform width.

According to the invention, a machine for cutting spiral str1ps from aroll of circularly knitted stockinet fabric so as to produce acontinuous strip of desired uniform width is characterized in that thefeeding of the fabric is effected by means of cards disposed in the formof a circle, the cards having downwardly directed teeth.

The invention is illustrated in the accompanying drawings in which:

F gure 1 is a side view of the lower part of the machine,

F gure 2 is a side view of the upper part of the machine,

Figure 3 is a perspective view of the main mechanism of the machine,

Figure 4 is a plan view of the feeding device of the machine,

Figure 5 is a section on the line 5-5 of Figure 4, and Figures 6 and 7are front and sectional views respectively of the cards used in themachine.

Referring to Figures 1 and 2, the machine comprises a base 1 to which issecured a pair of uprights 2 (only one shown). In an arm 2', secured tothe top of the uprights 2 is journalled a shaft 3 supporting a frame 4.In the frame 4 is rotatably mounted a roller 5 on which is disposed aroll 6 of stockinet fabric. The roller 5 is so disposed in the frame 4as to be readily removable therefrom. A roller 7 coated with emery clothis rotatably mounted in supports 8, 8', carried by the frame 4. Theroller 7 is adapted to engage the roll 6 of stockinet fabric. Themovement of the roller 7 may be checked by means of a spring 9 securedto the support 8, the position of the spring 9 being adjustable by meansof an adjustment screw 10 disposed in the said support. The stockinetfabric, when unrolled from the roller 5, passes over a guide bar 11secured to the frame 4.

An arm 12 is secured to the uprights 2 and carries a motor 13 and atube-formed bearing 14' with a flange 15 secured to its upper end. Inthis bearing a shaft 14 is journalled. The motor 13 drives a worm 16meshing with a worm wheel 17. The worm wheel 17 carries a worm 18 whichmeshes with a worm Wheel 19 secured to the shaft 14. To the flange 15 issecured a pair of brackets 20 which carry card lifting wheels 21.

To the shaft 14 is secured a card bracket 22 having a flange 23 providedwith a plurality of radial slots 23 (Figures 4 and 5). In the flange 23is disposed a circular recess 24 adapted to receive a ring 25. Sixteencard levers 26 operating in the slots 23' are each provided withrecesses 27, each recess being adapted to receive the ring and pivotthereabout. The flange 23 has adjustment screws 28 disposed near itsperiphery, the adjustment screws serving to limit the downward motion ofthe card levers 26. To the inner ends of the card levers 26 are securedsprings 29 which are secured to a spring plate 30 fast upon the shaft14. To the outer end of each card lever 26 is secured a card 31 havingdownwardly directed yieldable wire teeth 32 and a protective frame 33whose purpose is to prevent the teeth 32 from biting too deeply into thefabric and to reduce the friction against the fabric when the card islifted in a manner to be hereinafter described.

To the motor 13 is secured a pulley 34 which by means of a belt 35drives a second pulley 36 on which is Patented Dec. 7, 1954 disposed aneccentric 37 which drives a cutting device shown generally at 38. Thecutting device comprises a stationary and movable arm, each arm beingprovided with a knife which works towards the other in a clippingmovement. The cutting device works in accordance with the same principleas those normally employed in the special sewing machines used in thehosiery industry. The cutting device shown, however, is provided with afork-shaped member 39, which serves to lead the fabric between theknives.

In operation, the fabric disposed on the roller 5 is led over the guidebar 11 and passes over a member (not shown) which gives it a tubularform. The fabric, indicated generally at 40, is fed over the cards 31.When the motor 13 is started the card lift wheels 21 rotate and inpassing underneath the card levers 26 cause the latter to be lifted andpivot about the ring 31. When any particular card lever 26 is no longerin contact with a card lifting wheel 21, the card lever is restored toits normal position by means of its spring 29. In its upwards traversethe teeth 32 on the card lever 26 brush by but do not move the fabricsince the said teeth point downwardly. When, however, the card leversare restored under the action of the springs 29, the downwardly pivotingand moving teeth 32 penetrate the stockinet fabric and pull itdownwardly. The cards 31 therefore serve as the feeding mechanism of themachine. The rotation of the fabric against the cutting device 38 causesa continuous spiral strip 41 to be cut from the fabric, the strips beingcollected in suitable vessels or rolled up by special rolling devices.

The provision on the card levers 26 of a plurality of recesses 27adapted to receive the ring 25 makes it possible to vary thecircumference of the circle formed by the cards.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a machine for cutting a continuous spiral strip of selecteduniform width from a roll of circularly knitted stockinet fabric, thecombination comprising a device for feeding said fabric to the cutterelement of the machine including a circular array of card means havingdownwardly directed yieldable wire teeth adapted to engage and move saidfabric downwardly, means for rotating said circular array of card meansabout the axis of said array, spring means cooperative with each cardfor biasing the card to its down position, roller means engaging andraising said card means in succession upon rotation of said array ofcard means against the force exerted by said spring means and out ofgripping engagement with said fabric, and a cutter device positionedadjacent said array of card means and presenting a cutting edge to thefabric below said array of card means and which cuts the fabric in stripform in a direction transverse to the feed direction thereof, thedownward movement of the fabric per revolution of said array of cardmeans being equal to the width of the strip cut off by said cutterdevice. 2. A feed device as defined in claim 1 wherein said card meansare each comprised of a card carried at the outer end of a radiallydisposed pivoted lever and which further includes means for adjustingthe pivot axis of each lever in a radial direction to thereby effect acorresponding adjustment in circumference of the circular array of saidcard means.

3. A feed device as defined in claim 2 wherein the means for effectingthe radial adjustment in said card means is comprised of a ring of fixeddiameter adapted to engage a selected one of a plurality of spacedgrooves disposed longitudinally along said lever.

4. A feed device as defined in claim 1 wherein each of said card meansincludes a protective frame therefor to prevent the card from grippingthe fabric too deeply and which also reduces the friction against thefabric when the card is raised.

5. A feed device as defined in claim 1 and which further includesadjustable stop means individual to each said card means arranged toengage and limit the feeding movement of each said card means.

(References on following page) 3 References Cited in the file of thispatent %??582 UNITED STATES PATENTS 2,280,883 Number Name Date 905,207Mitchel'IetaI Dec. 1, 1908 5 1,066,304 Mitchell et al'. July 1, 1913Number 1,896,596 Seddon Feb. 7, 1933' 533,059

Name Date Warren Oct. 15, 1935 Bach Apr. 28, 1942 FOREIGN PATENTSCountry Date Germany Sept. 8, 1931

